參數(shù)資料
型號(hào)： TDA7564
廠商： 意法半導(dǎo)體
英文描述： MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES
中文描述： 多功能四功率放大器，內(nèi)置診斷特征
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 248K
代理商： TDA7564
TDA7564
8/20
Figure 14. Power Dissipation vs. Average
Ouput Power (Audio Program
Simulation, 4
)
Figure 15. Power Dissipation vs. Average
Ouput Power (Audio Program
Simulation, 2
)
0
1
2
3
4
5
Po (W)
0
5
10
15
20
25
30
35
40
45
Ptot (W)
Vs = 14 V
RL = 4 x 4 Ohm
GAUSSIAN NOISE
STD MODE
HI-EFF MODE
CLIP
START
0
1
2
3
4
5
6
7
8
9
Po (W)
0
10
20
30
40
50
60
70
80
90
Ptot (W)
Vs = 14 V
RL = 4 x 2 Ohm
GAUSSIAN NOISE
STD MODE
HI-EFF MODE
CLIP
START
DIAGNOSTICS FUNCTIONAL DESCRIPTION:
a)
TURN-ON DIAGNOSTIC
It is activated at the turn-on (stand-by out) under I
2
Cbus request. Detectable output faults are:
– SHORT TO GND
– SHORT TO Vs
– SHORT ACROSS THE SPEAKER
– OPEN SPEAKER
To verify if any of the above misconnections are in place, a subsonic (inaudible) current pulse (fig. 16) is inter-
nally generated, sent through the speaker(s) and sunk back.The Turn On diagnostic status is internally stored
until a successive diagnostic pulse is requested (after a I2C reading).
If the "stand-by out" and "diag. enable" commands are both given through a single programming step, the pulse
takes place first (power stage still in stand-by mode, low, outputs= high impedance).
Afterwards, when the Amplifier is biased, the PERMANENT diagnostic takes place. The previous Turn On state
is kept until a short appears at the outputs.
Figure 16. Turn - On diagnostic:
working principle
CH-
CH+
Isource
Vs~5V
Isink
t (ms)
I (mA)
Isink
Isource
~100mS
Measure time
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TDA7564B 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7564BH 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7564BPD 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7564BPDTR 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7565 功能描述:音頻放大器 Quad Power Amplifier Built-in Volt Conv RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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